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Biodegradation of microbial plastic poly(3-hydroxybutyrate) in soil ecosystems at different latitudes / S. V. Prudnikova, E. G. Kiselev, A. V. Demidenko [et al.] // Giant. - 2024. - Vol. 18. - Ст. 100288, DOI 10.1016/j.giant.2024.100288. - Cited References: 96. - The study was funded by State Assignment of the Ministry of Science and Higher Education of the Russian Federation (project No. FWES-2021-0025) . - ISSN 2666-5425
Кл.слова (ненормированные):
Poly(3-hydroxybutyrate) -- Degradability -- Red soil -- Chernozem -- Climatic conditions -- Soil microorganisms
Аннотация: The features of the degradation of the "green" plastic poly(3-hydroxybutyrate) [P(3HB)] in the soil of various geographical regions were studied: in red ferralitic soil under tropical conditions (Kerala, India) and in chernozem soil under conditions of a sharply continental climate (Eastern Siberia, Russia). Significant differences in the chemical composition, temperature, and humidity of the studied soils were revealed. The number of bacteria and mycelial fungi in the Siberian chernozem was higher than in the red soil of India, from 2-3 to 10 or more times. The degradation of P(3HB) films in the chernozem occurred faster than in the red soil, which was drier, with a low content of humus and minerals, and fewer microorganisms than the chernozem. The half-life of polymer samples in Siberia and India was 64.8 and 126.4 days, respectively. During degradation, a decrease in the molecular weight and an increase in the degree of crystallinity of polymer samples were revealed, which indicates a more active biodegradation of the amorphous phase of the polymer by soil microorganisms. The primary degraders of the polymer have been isolated and identified, and it has been shown that the complexes of degrading bacteria and fungi in different types of soils did not have common species. Despite the presence of species with pronounced depolymerase activity, the rate of film degradation in red ferralitic soils was slowed down by unfavorable environmental conditions. The obtained results confirm the importance of studying the process of PHA degradation in natural conditions.

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Держатели документа:
Siberian Federal University, 79 Svobodny pr, Krasnoyarsk 660041, Russia
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk 660036, Russia
Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50 Akademgorodok, Krasnoyarsk 660036, Russia
L.V. Kirensky Institute of Physics, 50/12 Akademgorodok, Krasnoyarsk 660036, Russia
International and Interuniversity Centre for Nano Science and Nano Technology, Mahatma Gandhi University, Kottayam 686560, India

Доп.точки доступа:
Prudnikova, S. V.; Kiselev, E. G.; Demidenko, A. V.; Nemtsev, I. V.; Немцев, Иван Васильевич; Shishatskaya, E. I.; Thomas, S.; Volova, T. G.
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